SEED CHARACTERISTICS OF SOME ORIENTAL TOBACCO VARIETIES DEPENDING OF THE TRANSPLANTING DENSITY

Abstract

The transplanting density is a very important factor when it comes to the acquisition of the planned yield of seed with appropriate quality taken from the certified tobacco seed plots. The main goal of this research was to establish tobacco seed yield and quality given by the tobacco planted with various transplanting density. The experiment was set in the Experimental Field of Scientific Tobacco Institute - Prilep. Further analyses of seed quality characteristics were performed in the accredited Laboratory for seed quality control of agricultural plants. The analyses were performed on two varieties of oriental tobacco type Prilep: P-66-9/7 and NS-72 in different transplanting variants: 50x15cm, 45х15 cm and 40х15cm. The area was prepared with the usual agro technical measures for tobacco seed plots for certification. The transplanting was performed manually in 5 repetitions. Morphological measures were performed on 10 plants of each tobacco varieties and variant of density of transplanting. The following morphological characteristics were analyzed: height and width of the stalk, height and width of fruit, and height and width of capsule. Also the weight of the fruit was analyzed together with the number of capsules in the fruit and the seed amount in the fruit of every stalk. After seed harvest and processing, the morphological measurement and laboratory analyses for seed quality were performed concerning the seed germination expressed in percentage and the apsolute weight expressed in grams. We can conclude that the seed given by a stalk which has growth on larger vegetation area produces better values concerning the yields and quality. The tobacco variety P-66-9/7 has average value of 13.68 g, NS-72 variety has 15.51 g. Which means that the stalks which growth on smaller vegetation for example P-66-9/7 has average value of 5.36 g and NS-72 has 6.76 g. Insignificant number of the results have shown a digression but it can be concluded that the seed obtained by the plants grown in larger vegetation area produce seed with better characteristics considering the quality and quantity of the seed.